An investigation on the mechanical behavior of expanded polystyrene (EPS) geofoam under different loading conditions

Mahmoud, Gouda M.; Hegazy, R.; Mohamed, Moenes

doi:10.1007/s12588-017-9175-6

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…Expanded Polystyrene (EPS) foam is a cellular material used widely for energy absorption and thermal insulation applications, such as packaging [1,2] , as a structural core material [3,4] , for geofoam products [5][6][7] , and as helmet liners [8][9][10][11][12] . Due to its light weight, low cost, easy manufacturability and, most importantly, good energy absorption, it has long been used as an engineering material in diverse applications.…”

Section: Introductionmentioning

confidence: 99%

“…Much work has been done to investigate the mechanical behaviour of EPS foam material. Its compression behaviour, both at static and dynamic strain rates, has been studied widely [5,6,14,15] , but less so under the action of tensile, shear or more complex loading situations, such as combined compression/tension with shear behaviour. However, under many applications, the EPS foam is not subjected to pure compression.…”

Section: Introductionmentioning

confidence: 99%

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Deformation response of EPS foam under combined compression-shear loading. Part I: Experimental design and quasi-static tests

Ling

Ivens

Cardiff

et al. 2018

International Journal of Mechanical Sciences

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Expanded Polystyrene (EPS) foam material is widely used as an energy absorption engineering material. Its compression behaviour, both quasi-statically and dynamically, has been studied widely. However, its mechanical behaviour under combined compression-shear loading is poorly understood due to the difficulty of performing such tests. A novel test rig is presented to perform combined compression-shear loading tests in quasi-static and high strain rate dynamic conditions. Different densities of EPS foam were tested with this apparatus using a universal testing machine and a drop tower. The compressive and shear stress and strain curves were obtained and compared with the mechanical behaviour of EPS foam under pure compression. This showed that the shear deformation of EPS foam under combined compression-shear loading tends to lower the compressive stress at yield of the foam up to 40% compared with pure compression, depending on the density of the foam. A companion Part II paper will separately present and discuss the experimental results of the high strain rate dynamic tests of EPS foam under combined compression-shear loading.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deformation response of EPS foam under combined compression-shear loading. Part I: Experimental design and quasi-static tests

Ling

Ivens

Cardiff

et al. 2018

International Journal of Mechanical Sciences

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“…The corresponding average compressive and shear strain rates can thus be calculated based on the initial impact velocities and the dimensions of the foam sample 3 . Table 1 shows the list of the average compressive and shear strain rates for the two impact wedge loading angles from the three drop heights.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Understanding the dynamic mechanical behaviour of EPS foam under combined compression-shear loading is important for many applications that involve such combined loadings, including structural core material [1,2], geofoam products [3,4,5], personal protective equipment and helmet liners [6][7][8][9][10]. Related experiments and data, however, are rarely found in the open literature due to the difficulties of performing such experiments.…”

Section: Introductionmentioning

confidence: 99%

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Deformation response of EPS foam under combined compression-shear loading. Part II: High strain rate dynamic tests

Ling

Ivens

Cardiff

et al. 2018

International Journal of Mechanical Sciences

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In Part I, we performed quasi-static compression-shear tests on expanded polystyrene (EPS) foam. In the present study, dynamic combined compressionshear loading tests were performed on different densities of EPS foam by integrating the previously developed loading rig with a lab-built drop weight tower. Two impact loading wedge angles (45° and 60°) and three different drop heights (50, 130 and 175 cm) were tested in the experiments. It was found that both the compressive and shear stresses at yield of the EPS foam are density and strain-rate dependent. In addition, increasing the impact loading angle tends to decrease the compressive stress and increase the shear stress at yield of the EPS foam.

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Parametric evaluation and prediction of design parameters of geofoam using artificial neural network and extreme gradient boosting models

Sreekantan,

Pant,

Ramana

2024

Innov. Infrastruct. Solut.

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An investigation on the mechanical behavior of expanded polystyrene (EPS) geofoam under different loading conditions

Cited by 6 publications

References 5 publications

Deformation response of EPS foam under combined compression-shear loading. Part I: Experimental design and quasi-static tests

Deformation response of EPS foam under combined compression-shear loading. Part I: Experimental design and quasi-static tests

Deformation response of EPS foam under combined compression-shear loading. Part II: High strain rate dynamic tests

Parametric evaluation and prediction of design parameters of geofoam using artificial neural network and extreme gradient boosting models

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